Originally posted by showtime: check the IAC "idle air controller"
Definitely...the IAC (as I understand it) is like a regulator-type sensor for airflow at idle, and if it's gotten sticky or sludgy, it won't respond properly to airflow restrictions. Mine's being replaced today, in fact, and I had the EXACT same symptoms.
"Think of it, if you like, as a librarian with a G-string under the tweed." Clarkson on the Mondeo.
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